Lab 1 Decantation and Filtration
Summary
TLDRThe video demonstrates two methods for separating a mixture of water and sand: decantation and filtration. Initially, sand is mixed with water in a beaker, creating a heterogeneous mixture. The first technique, decantation, involves allowing the sand to settle and then carefully pouring off the water, leaving most of the sand behind. The second method, filtration, uses a funnel, filter paper, and a ring stand to catch finer sand particles, resulting in clearer water. The video emphasizes the importance of patience and careful technique for effective separation.
Takeaways
- 🧪 The video demonstrates two methods for separating a mixture of water and a solid that does not dissolve in water.
- 🏺 The first technique shown is decanting, where the solid (sand) is allowed to settle and the liquid (water) is carefully poured off from the top.
- 🔬 The second technique is filtration, which uses a funnel, filter paper, and a ring stand to separate finer particles of the solid from the liquid.
- 🌊 The video explains that the mixture created is a heterogeneous mixture because the different components (sand and water) are visible.
- 🕒 Decanting is a quick method for a rough separation, leaving larger particles of the solid behind while pouring off the liquid.
- 📝 The video emphasizes the importance of careful pouring to minimize splashing and loss of liquid during the decanting process.
- 🔍 Filtration is shown to be a more thorough method for separating smaller particles that are not removed by decanting alone.
- 📐 The setup for filtration includes a glass funnel, filter paper, ring stand, and a beaker to collect the filtered liquid.
- 💧 The video illustrates that filtration takes time and patience, as the liquid slowly drips through the filter paper, leaving the fine particles behind.
- 🌟 The final result of the filtration process is a clearer liquid compared to the decanted liquid, indicating successful separation of the finer particles.
Q & A
What is the purpose of the experiment described in the script?
-The purpose of the experiment is to demonstrate two methods for separating a mixture of water and a solid that does not dissolve in water, specifically sand.
What are the two techniques used to separate the sand from the water as described in the script?
-The two techniques used are decantation and filtration.
What is a heterogeneous mixture as mentioned in the script?
-A heterogeneous mixture is a mixture that has visible different parts, like the water and sand mixture where the sand particles are visible within the water.
How does the process of decantation work in separating sand from water?
-Decantation works by allowing the solid particles (sand) to settle at the bottom and then carefully pouring off the liquid (water) from the top, leaving the sediment behind.
What is the role of the chemical spatula in the decantation process?
-The chemical spatula is used to guide the pouring process during decantation, minimizing splashing and ensuring that the sand stays behind while the water is poured into another container.
Why is filtration necessary after decantation in the experiment?
-Filtration is necessary after decantation to separate the smaller, finer particles of sand that are still suspended in the water and were not removed by decantation alone.
What setup is used for the filtration process as described in the script?
-The filtration setup includes a ring stand, a glass funnel, filter paper, and a beaker to collect the filtered liquid.
How is the filter paper prepared and placed in the funnel for filtration?
-The filter paper is folded into quarters to create a cone shape, then placed in the glass funnel and gently pressed against the funnel walls. It is wetted to help it stick to the funnel.
What is the importance of adjusting the funnel setup so that the liquid runs down the wall of the beaker during filtration?
-Adjusting the funnel setup to allow the liquid to run down the wall of the beaker prevents splashing and ensures a more efficient and controlled filtration process.
How does the script describe the difference between the water before and after filtration?
-The script describes the water before filtration as cloudy due to the presence of fine sand particles, while the water after filtration is clearer, indicating that the filtration process has successfully removed the suspended particles.
Outlines
🌊 Separating Sand from Water: Decantation Technique
The presenter introduces two methods for separating a mixture of water and a non-soluble solid, using sand and water as an example. They demonstrate the first method, decantation, by adding sand to a beaker and then water, creating a heterogeneous mixture. The presenter explains that allowing the mixture to settle enables the sand to sink to the bottom while the water remains on top. Carefully pouring the water into another container leaves the sand behind, achieving a rough separation. The process is shown with attention to minimizing splashing to retain as much of the liquid as possible.
💧 Further Separation with Filtration
Following decantation, the presenter sets up for the second method, filtration, to separate finer particles of sand from the water. They prepare a glass funnel with filter paper, ensuring it's secured in place by wetting the paper and pressing it against the funnel's walls. The presenter uses a chemical spatula to carefully pour the cloudy water into the funnel, allowing it to filter through the paper. They emphasize the importance of patience as the filtration process is slow due to the fineness of the filter paper. The result is a clear separation of the sand particles, leaving behind cleaner water in the beaker, demonstrating the effectiveness of filtration in removing smaller, suspended particles.
Mindmap
Keywords
💡Separation
💡Mixture
💡Heterogeneous Mixture
💡Decantation
💡Sediment
💡Filtration
💡Filter Paper
💡Funnel
💡Chemical Spatula
💡Ring Stand
💡Wash Bottle
Highlights
Introduction to separating a mixture of water and a solid that does not dissolve in water
Demonstration of creating a heterogeneous mixture by adding sand to water in a beaker
Explanation of the goal to separate sand from water without any sand particles
First technique introduced: allowing the solid to settle down
Decanting process demonstrated to separate the liquid from the settled solid
Use of a chemical spatula to minimize splashing during decanting
Result of decanting: a rough separation with some fine particles still in the liquid
Introduction of the second technique: filtration
Setup for filtration using a ring stand, funnel, filter paper, and wash bottle
Instructions on how to properly fold and place filter paper in the funnel
Wetting the filter paper to ensure it adheres to the funnel
Pouring the mixture slowly into the filter to avoid overflowing the filter paper
Observation that filtration takes time and requires patience
Comparison of the cloudy and clear water to show the effectiveness of filtration
Conclusion on the two separation techniques used: decantation and filtration
Transcripts
all right so now what I'm going to do is
I'm going to show you two ways of
separating separating a mixture of water
and a solid that does not dissolve in in
the water so what I've got here is I've
got some sand this is some sand and I'm
going to place this sand in in this
beaker placing some sand in the beaker
and now I am going to add some water
into the beaker and my goal is going to
be to separate the sand from the water
to try to recover the water without any
sand particles in it so I am creating
here what we call a mixture right
you can see I've got a set up right here
I'm going to use it later on so I've got
this set up I'll go I'll explain it in
just a second so I've got my sand and
I've got my my water in the beaker and
I've got my chemical spatula and I'm
going to use the chemical spatula to
stir so what I'm doing is I am mixing
right so this is now a mixture you can
you may remember from biology or
previous Sciences this is called a
heterogeneous mixture because I can see
the different parts I can see the water
and the sand so I've started long enough
we're satisfied this is a a mixture and
we can see that I've got sand and I've
got water in here and I would like to be
able to separate them as much as
possible so what I'm going to do is the
first strategy the first technique that
we can use to separate a solid that does
not dissolve in water is a we first
allow it to settle down so here we've
allowed it to sit for a little while you
can see most of the sand is at the
bottom of the be
and then the water is at the top and
when this happens we've allowed this tap
and we can decant the liquid right so
we're going to decant the liquid on top
dekat means to pour out carefully so
that you leave the sediments on the
bottom so the sand that is on the bottom
I want to keep it there and I'm going to
pour it carefully into another container
in order to begin separating them and
this is going to be a rough separation
now notice I'm going to take my rope my
chemical spatula and I'm going to put it
over the top so that the glass part of
this spatula is on the spout here of the
beaker I'm going to hold it with my hand
like this and I'm going to use I'm going
to use it to pour into another beaker
and what I'm trying to do is I'm trying
to minimize splashing so that I don't
lose so much of my solution so I'm going
to I'm going to place this against the
wall of the beaker and I'm going to pour
it carefully just with a slight tilt
okay so that it pours into the beaker
and notice there is no splashing right
if I were working with a chemical that
was in water okay notice I'm being very
careful I'm pouring slowly so that the
sand stays behind at least the large
particles of sand stay behind and this
is decanting decanting alright so notice
I left most of the sand behind and I
have mostly water over here but it's a
little cloudy you can see it's a little
cloudy we've got some fine particles in
there so decanting gives us a good
initial separation in these types of
situations but we want a better
separation want to get most the most
that we can out so what I'm gonna do is
I'm gonna set up a system here to filter
the rest so one of them is decanting I
just showed you that pouring it out
carefully so that we're able to separate
the liquid that is on the top from the
solid that is left behind on the bottom
and then the next one is going to be
filtering you can
filter and to filter we're going to be
using a set up that is going to use a
some filter paper and we've got our
funnel right here I've got a glass
funnel notice that I've got my ring
stand with my ring hooked up to it I
have a beaker that I'm going to hold my
liquid in and I've got a filter paper
I've got a filter people show you how to
use the filter paper in a little bit but
the first thing I'm gonna do is I'm
going to adjust my setup I'm going to
bring down my ring so that the funnel is
a little slightly just slightly in the
beaker and then I'm going to place the
beaker so that the funnel is touching
the wall of the beaker again what I want
is I want the liquid that begins to drip
down to run down the wall of the beaker
I don't want it to splash alright so now
setting up the filter paper way to set
up the filter paper in here I'm also
going to need my wash bottle I'm first
going to squirt my funnel real quick so
that the filter paper will stake a
little better on there okay you can see
there is no splashing in this case its
water on water so it doesn't matter I'm
not going to have to dump this out
alright so now I'm going to fold my
filter paper into quarters so here's I
folded it into half here folded into
half and I'm going to fold it into half
again
they hold it into half again and what
I'm going to do is I'm going to take the
first right I've got one two three
layers that I've made right so I'm going
to take the first layer and notice that
the first layer will give me a good comb
right here so now I just open it and it
gives me a cone shape a funnel shape I'm
going to place it in the glass funnel
and I'm going to press it gently against
it I don't want to tear it and for the
funnel paper for the funnel for the
filter paper to stick to the funnel I'm
actually going to have to add a little
bit of water and I'm going to have to
wet it okay and that will allow my
filter paper to stick against the walls
of the funnel so now I'll just very
gently push against it I want my paper
to really stick against the walls but
don't tear it careful not to tear all
right so there it is so now what I can
do is once again being very careful I'm
going to use again my chemical spatula
and this time I'm placing the chemical
spatula all the way down into the filter
paper right and I'm going to pour a
little bit at a time so that it only
goes halfway up the filter paper right I
stopped notice that the water is coming
down starting to come down I don't want
to go above the filter paper so it's
safer to just go halfway up the filter
paper filtration takes quite a bit of
time now this isn't against the wall so
I need to adjust it there we go I
shouldn't see dripping down I should see
a stream coming down the side and so
once the water or the liquid level has
gone below the half I can add a little
bit more and I can continue to
filter the liquid here the filter paper
we're using is very fine and so it does
take a while for the liquid to come down
so if we ever do this in class you got
to be aware that this process takes some
time and you got to be patient with it
you've got to do it right all right so
I'm going to let it run down just a
little bit but I want to show you again
notice that this liquid is kind of
cloudy here it shows us that there are
some small particles that are suspended
in the water still some particles of
sand and I'm just going to remove this
and put it to the side for now you can
still see there is some water but I just
want to show you the difference so I'll
pour this out we're not going to do this
anymore and I will show you the
difference you can see how this water is
much more clear than this water this
one's kind of cloudy
this one's clear and this is the water
that has been filtered the filter has
been able to catch those smaller
particles those finer particles of sand
that we're still suspended in the water
and so those are the two types of
separations that we use separation
techniques that we use one of them is
decantation we decant the liquid to
separate it from big particles of solids
the other one is filtration we use this
set up with a ring stand the ring the
funnel the filter paper and the wash
bottle and that allows us to separate
smaller finer particles that we cannot
separate through decantation
Weitere ähnliche Videos ansehen
Rapid Sand Filter | PSM lectures | Gravity Filter | Environmental Engineering
Soil Texture - Environmental Science
SCIENCE GRADE 6: Separating mixtures through Decantation, Evaporation and Filtration
WATER TREATMENT PROCESS ( WHOLE PROCESS IN 15 MIN VIDEO) (HINDI) | WSSE ENVIRONMENTAL ENGINEERING
Paper Chromatography - MeitY OLabs
Praktikum Kimia Projek Air Hujan
5.0 / 5 (0 votes)